Q. 364.7( 3 Votes )

Evaluate the foll

Answer :

Assume x + cos2x =t


d(x + cos2x) =dt


(1 + ( - 2cosx.sinx))dx = dt


2sinx.cosx=sin2x


(1 - sin2x)dx=dt


Put t and dt in given equation we get



=


But t = x + cos2x


= ln| x + cos2x | + c.


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